whats up guys i needed a little help on piston choice as i am trying to build a low compression .030 over 4 bolt engine i have i am looking to pull 8:5:1 to 9:0 comp how can i go about doing so in building a bottom end to do so some help with piston choices as i am yet to understand.

i will be for sure running a set of 6" eagle forged rods with floating pins what crankshaft and what piston can i use to acheive this i am currently running the block which has been decked not much and the heads have about 20 thousandths milled off of them what can i do to drop my 10 1/4 comp to 8:5:1.

please guys any help would be apprecated.

 

It sounds like your using the stock castings. If thats the case, don't think you can get down to 8.5. Think the best you can do is about 9:1 or just a tad higher with some chamber work and something like a JE extream duty -31cc dish. Your options would increase if you wen't with an aftermarket head.

Ken R.